Abstract: Disclosed is a cutter bit (1) for use in drilling operations comprising a body (10) having a top portion (11) and a bottom portion (12), the bottom portion (12) being provided with cutting elements for cutting a formation to which the cutting elements is exposed. Within an outer circumference (13) of the bottom portion (12) of the body (10) there is provided an opening (14) to a first passage (15) through the body (10) to communicate a first zone (20) of a hole located below the bottom portion (12) of the body (10) with a second zone of the hole located above the bottom portion (12) of the body (10).

Abstract: A vibrator for compacting construction materials has a housing having a housing mantle with a first end face and a cylindrical interior. The housing has an upper part for closing the housing at the first end face. The upper part is axially inserted into the housing mantle and secured in a closing position thereof against axial displacement. A radially inwardly extending support surface is connected within the housing mantle. An electric motor is drivingly connected to an unbalanced shaft. The electric motor has an inner rotor end an outer cylindrical stator pack end is inserted into the housing mantle from the first end face. The stator pack has a recess and is inserted into the housing mantle with sliding fit and secured against rotation. A spreading element made of spring steel for securing the stator pack is inserted into the housing mantle through the first end face and positioned on the stator pack before closing the housing to be clamped between the support surface and the upper housing part.

Abstract: Surface drainage apparatus comprises a channel body defining a drainage channel with a cover defining apertures through which drainage can pass into the drainage channel. A fixing means for attachment of the cover to the channel body is provided and comprises a first fixing element for attachment to said channel body and a complementary second fixing element for attachment to said cover. The second fixing element comprises a bolt that is mounted in the cover so as to be capable of sliding into a locking position in the direction toward a long edge defined by said cover and back out of this locking position into an opened position. The first fixing element comprises a retaining means which when the bolt slides into the locking position engages with the bolt in such a way that said cover is retained on the channel body.

Abstract: A dock leveler scissors lift system mounted in a pit having back and side walls. The scissors lift mechanism comprises first and second scissors arms mounted on a base frame, one of the arms pinned to the base for pivotal movement and the other of the arms is free to move relative to said base. Hydraulics are employed to raise scissors lift. The scissors lift mechanism further comprises an upper frame having a generally horizontal deck portion. Retractable pins are used to couple said scissors lift mechanism to the pit in the fully raised position. The a dock leveler deck assembly is pivotally mounted to the generally horizontal deck portion of the scissor lift mechanism, and hydraulics coupled to the scissors lift mechanism raises the deck assembly. The scissors lift mechanism includes lip keepers that in one position retain the leveler lip in the pendent position and in a second position support the outboard end of the leveler deck.

Abstract: A capsule for treating a tree or other wooden element is disclosed as including a head element having a shank portion with an internal cavity containing a chemical agent. The internal cavity is sealed by a plug in an end of the shank portion remote from the head element. The head element, shank portion, chemical agent and plug form a self-contained unit which is inserted into a pre-drilled or pre-punched hole in the tree or other wooden element. The shank portion is made of a frangible material so that upon breaking as a result of an impact force applied to the head element, the chemical agent is free to be absorbed into the tree or other wooden element.

Abstract: A method and an apparatus for recovering oil from a oil bearing formation having a mixture of oil and water. A first borehole and a second borehole are formed in oil bearing .formation and extend in a horizontal direction. The first borehole is disposed below the second borehole. Seismic waves are generated in the oil bearing formation to reorganize the mixture into oil and water to promote flow of the oil to the second borehole, the seismic waves emanating from the first borehole. The oil is then recovered from the second borehole.

Abstract: A nursery container that provides an improved root structure for plants intended to be transplanted into the ground. This container is characterized by a base that is constructed to direct initial root growth towards an elevated opening that is centrally located in the base. It is through this opening where initial root growth is air pruned thus encouraging the early development of secondary lateral roots. The base design also serves to aerate the growing medium in the center of the container thus aiding in the reduction of medium compacting and drainage. This container is also characterized by a plurality of vertical indentations that protrude towards the periphery of the container, each one being open at the bottom. Because of these indentations the root tips are encouraged to grow down towards the openings for air pruning thus continuing the development of lateral roots. The indentations also serve to aerate the growing medium in the sidewall area.

Abstract: A device for augering a conical hole in a solid medium that includes a first elongated member that extends along a longitudinal axis and a cutting blade having a cutting section and a non-cutting section coupled to the first elongated member. The rod is adapted to be rotated about the longitudinal axis. A motor is coupled to the first elongated member which rotates the cutting blade about the longitudinal axis. A shroud is provided through which the first elongated member passes. The shroud attaches to a hydraulic unit. Activation of the hydraulic unit causes the first elongated member to move in a longitudinal direction, which causes the cutting blade to move in a radial direction thereby forming a conical hole in a solid medium. The device is used for forming holes used in foundations and anchors. Also disclosed is a method of operation of the device to form a conical hole in solid media.

Abstract: A plastic barricade is formed from identical panels placed back to back and hinged together. Each panel includes a handle at the top, vertical legs with reinforcing ribs, and horizontal cross-members. The bottom most horizontal cross-member includes a stacking lug that may be inserted into the handle to prevent a stack of barricades from tipping over. The barricade may also be designed to be compatible with existing barricades.

Abstract: A gun hanger for emplacement through a tubing string into a casing string, comprising an inner mandrel, a setting means slidably received on said mandrel, said setting means including a plurality of spaced apart, extendable slips mounted thereon such that operation of said setting means causes said slips to extend and engage the casing string, a slip release means slidably received on said mandrel such that operation of said slip release means causes said slips to retract and disengage from the casing string, said setting means and said release means having diameters less than the inside diameter of the tubing string when said slips are retracted, a centralizer mounted on and extending axially from the hanger, said centralizer comprising a stem and a plurality of evenly circumferentially spaced longitudinal bow springs flexibly mounted thereon, said bow springs being longitudinally spaced along said stem such that each spring longitudinally clears its preceding and succeeding springs when said springs are com

Abstract: The invention relates to a bridge comprising at least one bridge elements. The bridge elements has a base body that has chamfered end surfaces on which roadway plates rest that can be necessarily brought out of a drive-on position into a coupling position by hinged ramp plates in that respectively two bridge elements are moved toward the ramp plates into a drive-on position. The apparatus for laying the bridge has a guide (support rail, holding sheet) for the guide members of the ramp plates so that the bridge elements can be reliably guided together. Moreover, the apparatus has guide rails with which the locking elements (hook, pins) can be centrally actuated.

Abstract: A grass catching attachment for use with a rotary lawn mower is disclosed. The attachment includes a flexible bag which has been adapted to expand the capacity of a rigid, grass catching receptacle frequently employed by commercial landscapers during mowing operations. The bag is fabricated from a number of specially shaped panels of durable fabric sewn together to form an elongated envelope having a generally curved configuration. The top and bottom panels of the bag include a narrowed and rearwardmost terminus positioned outside a rearward projection of either of the top or bottom panel's front edge thus allowing the distal end of the bag to be suspended directly beneath at least one of the mower handlebars. A rigid frame having a peripheral channel for engagement with brackets extending from the grass catching receptacle as well as for the receipt of a drawstring sewn into the flexible bag is provided for joining the bag and the rigid receptacle.

Abstract: A dock leveler for providing a bridge into the rear end of a truck trailer over which a fork vehicle can travel in loading the truck trailer. The dock leveler includes a ramp with a rear section and an extendible forward section. The forward section telescopically extends from and retracts into the rear section under power from a hydraulic cylinder. The forward section can be locked in place to prevent retraction of said forward section relative to said rear section under the traction developed by the drive wheels of a fork vehicle as the fork vehicle travels over the dock leveler. Various structures for indicating the amount of overlap of the dock leveler on the truck trailer are also provided.

Abstract: A reduced-weight bridge deck having a plurality of areas which are void of concrete to provide a lower dead load force and to reduce the product costs. The bridge deck includes structural support bars, post-tensioning ducts and a concrete component. Concrete component has spaced downwardly projecting protrusions which laterally distribute forces and permit the ability of providing areas void of concrete therebetween. The post-tensioning ducts are located within and extend through the downwardly projecting protrusions. The strength of deck is achieved by placing the tendons within the ducts. The tendons are tightened and anchored to the ends of the deck to prestress the concrete component. The unique section design and the post-tensioning eliminates the need for reinforcing bars which can deteriorate and contribute to structural failures. Methods for manufacturing the bridge deck from precast panels and by cast-in-place sections are also disclosed.

Abstract: A mower unit includes a housing having a skirt portion extending toward the ground, and a covering wall surrounding a plurality of grass cutting blades to define spaces for mulching treatment. The covering wall includes peripheral wall members each curved along a locus of revolution of the blade and spaced from the skirt portion. The peripheral wall member includes a vertical portion descending toward the ground. The vertical portion and the skirt portion have lower ends thereof substantially at the same height over the ground. The blades are arranged transversely of the mower unit. The peripheral wall members are in the form of independent annular wall members provided for the blades, respectively. The annular wall members define spaces for mulching treatment substantially independent of one another.

Abstract: An oil or gas well cleaning method includes inserting tubing, such as a coiled tubing, into a well bore, for example, into a production pipe in a well bore. A cleaning fluid containing a flocculant is passed into the well and the flocculant in the cleaning fluid is mixed with solid particles in the well bore to flocculate the particles. The cleaning fluid and the flocculated particles are then removed from the well. In one embodiment, the cleaning fluid containing the flocculant is discharged from the lower end of the tubing into the well, and the cleaning fluid with the flocculated particles is removed from the well via the production pipe. Alternatively, the cleaning fluid containing the flocculant may be introduced into the well through the production pipe, and the cleaning fluid with the flocculated particles may be removed via the tubing. The flocculant may also serve as a friction reducer to reduce friction between the cleaning fluid, the solids, the production pipe, and the tubing.

Abstract: A portable track device for a wheelchair includes at least two track sections which can be coupled removably to each other, and each track section has a bottom channel between a right sidewall and a left sidewall, with a reinforcement rod in each sidewall and with transverse supports located in the bottom channel. Each track section is equal to, or greater than, the length of the wheelchair. The occupant of the wheelchair can travel safely across difficult terrain, such as a sandy beach.

Abstract: Reflective bodies (6, 7) made of a transparent material are provided at their surface with distributed color spots (8), so that light can enter and exit the reflective bodies with enough intensity to generate a retroreflection. These reflective bodies are to be applied on road or other traffic surfaces, on road markings or on traffic guiding surfaces in order to make them visible, in particular at night or in rain.

Abstract: A seal for a wellhead housing employs a locking groove. The seal is of a U-shape, having an inner and outer radially spaced apart legs. An energizing ring is stroked downward to force the legs apart to cause them to seal between the wellhead housing in the conduit and the wellhead housing. At least one groove is located on one side of the energizing ring, with the groove being of a saw-toothed shape to allow entry but to resist upward movement of the energizing ring. In a metal version of a seal, the groove is located on the exterior of the energizing ring so as to allow some axial movement of the inner leg of the seal relative to the energizing ring. In a second version, the seal is of plastic.

Abstract: A machine and method of use to form Sonic Noise Alert Pattern (SNAP) type depressions in the surface of an asphalt road in a series to line the edge or center of a road. The machine installs a plurality of depressions in a group during a single cutting procedure. A repetition of these cutting procedures results in the desired series being formed. The machine has a single rotary type milling head with spaced sets of bits which will engage the surface of the road. Only where the spaced sets contact the surface will the cutting action be performed. From a stationary position an initial plunge cut brings the rotary cutting head in contact with the surface. Then a lateral movement of the rotary cutting head results in elongating and forming the desired sized depressions. Then the rotary cutting head is raised, the machine is advanced and the prior steps are repeated in repetition until the desired number of depressions have been formed.